Look 595 internal (std shimano) cable routing - 7900 - and it shifts like a dream, easily as good as the Ultegra sl on my other bike.Its a different feel, yes but does the job and the hoods i find more comfy and i dont find the setup of it any different from any other Shimano 10sp.Downside - the shifters seem to rattle far more than i'm used too.

Been running 7900 for like 3 years, now got a secondary bike with 6700. Interestingly the 6700 feels way smoother, much more like the 6600 (which I thought had the mechanical advantage of avoiding the handlebar bends). Anyway my 7900 and 6700 are set up very similar, both externally routed to the frame, Nokon housing, KMC chain. Surprised there is such a difference, the 7900 requires more force to shift, and feels snappier, the 6700 is very smooth.

My 7900 has been shifting perfectly for 3 3 years. It required slightly more force to shift at first but, once I installed Gore Ride-On Pro cables it shifts as smooth and refined as my 7800 equipped bike. In fact smoother. So the derailleur cable does make a difference.

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